$word_{count}$: 230

Analgesics: Pain relief. Non-narcotic: Aspirin (inhibits COX → blocks prostaglandins → analgesic + antipyretic + anti-inflammatory), Ibuprofen, Paracetamol (analgesic + antipyretic only, NOT anti-inflammatory). Narcotic: Morphine, Codeine, Heroin (diacetylmorphine — most addictive). Bind opioid receptors in CNS. Antibiotics: Kill/inhibit bacteria. Bactericidal (kill): Penicillin (blocks cell wall synthesis), Cephalosporins. Bacteriostatic (inhibit growth): Tetracycline (broad-spectrum, blocks protein synthesis), Erythromycin, Chloramphenicol. Broad-spectrum = effective against many bacterial types. Antiseptics (living tissue): Dettol (chloroxylenol), iodine tincture, boric acid, H2O2. Disinfectants (non-living surfaces): Phenol 1%, chlorine (water), SO2 (rooms). Same chemical, different application. Antifertility: Norethindrone (synthetic progesterone), Ethynylestradiol (synthetic estrogen). Prevent ovulation via negative feedback. Antacids: Neutralize stomach acid. Al(OH)3, Mg(OH)2, NaHCO3. H2-blockers: Ranitidine (reduces acid secretion). Antihistamines: Block histamine receptors. Brompheniramine (allergy). Ranitidine (stomach acid — H2 blocker). Tranquilizers: Reduce anxiety. Chlordiazepoxide, Diazepam (benzodiazepines, enhance GABA). JEE focuses on: drug → class matching, mechanism of action $\frac{especially aspirin}{penicillin}$, antiseptic vs disinfectant distinction.